CN100369775C

CN100369775C - Vehicle brake system

Info

Publication number: CN100369775C
Application number: CNB2005101041847A
Authority: CN
Inventors: 稻垣裕巳; 有川康博; 后藤胜; 小堀秀俊
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2004-09-30
Filing date: 2005-09-29
Publication date: 2008-02-20
Anticipated expiration: 2025-09-29
Also published as: CN1754730A

Abstract

A lock piston 64 operates to automatically lock a parking brake piston 53 which achieves a parking brake applied state in response to hydraulic pressure in a parking brake application control hydraulic chamber 54 and operates to release a locked state in response to hydraulic pressure in a parking brake release control hydraulic chamber 69 , and a manual change-over unit 108 holding the hydraulic pressure in the parking brake release control hydraulic chamber 69 to a hydraulic pressure on a lock release side, is provided among the wheel brake side hydraulic path 76 , the parking brake application control hydraulic chamber 54 and the parking brake release control hydraulic-chamber 69 by bypassing a hydraulic pressure control unit 87 which changes over the application or release of hydraulic pressure to the parking brake application control hydraulic chamber 54 and the parking brake release control hydraulic chamber 69.

Description

Vehicular brake device

Technical field

The present invention relates to a kind of Vehicular brake device, particularly relate to the Vehicular brake device that utilizes hydraulic action and can obtain stopping brake (hand braking) state.

Background technology

This Vehicular brake device is known to for example patent documentation 1 record such as grade.

Patent documentation 1: the flat 10-512947 communique of special table

But, in the above-mentioned patent documentation 1, brake piston is divided into front portion and rear portion brake piston, simultaneously, and the transmission member of rear portion brake piston front end butt and be fixed on that compression is provided with spring between the closing panel of anterior brake piston, forwardly the brake piston rear is housed in the brake clamp with the ratchet that delineation is arranged on the internal gearing of brake clamp inner face, and at the above-mentioned transmission member that engages with internal tooth with state with rear brake piston front end butt, when rear portion brake piston front end forwards relatively moves, utilizing engaging of spring energized releasing and internal tooth, on the brake piston of above-mentioned rear portion, be combined with the auxiliary piston that transmission member is relatively moved at direction of principal axis with respect to the rear portion brake piston free sliding.But, internal tooth is set, also brake piston to be divided into front portion and rear portion brake piston and ratchet is housed in the brake clamp owing to must delineate at the brake clamp inner face, therefore, the complex structure in the brake clamp.

Summary of the invention

The present invention, promptly produce in view of relevant thing, its purpose is to provide a kind of Vehicular brake device, the simple structure that can switch hydraulic pressure with the electrical control that utilizes hydraulic brake system obtains the stopping brake state, even while above-mentioned hydraulic control device generation instability under the stopping brake state also can be removed the stopping brake state with M/C.

To achieve these goals, Vehicular brake device of the present invention, it possesses: pressure hydraulic generator, it can act on the corresponding hydraulic pressure of operation with drag control member to the car side brake side hydraulic pressure road that links to each other with car side brake, hydraulic power source, it can move independently with this pressure hydraulic generator, the parking piston, the modulated pressure chamber is used towards stopping in its back side, and the utilization and the hydraulic pressure of using the modulated pressure chamber that stops increase the forward motion that produces accordingly, and can obtain to be equipped with above-mentioned car side brake wheel stop braking mode, lock piston, it automatically locks this parking piston by action at progressive position, simultaneously move to the side that unlocks accordingly with stopping to remove with the hydraulic pressure increase of modulated pressure chamber, hydraulic control device, it carries out electrical control and removes with modulated pressure chamber effect hydraulic pressure with modulated pressure chamber and above-mentioned parking to above-mentioned parking in order to switch from hydraulic power source, and use modulated pressure chamber and above-mentioned parking to remove from above-mentioned parking and use the modulated pressure chamber to discharge hydraulic pressure, and manual switching device, it is walked around this hydraulic control device and is arranged on above-mentioned car side brake side hydraulic pressure road, above-mentioned parking is removed with between the modulated pressure chamber with modulated pressure chamber and above-mentioned parking, M/C with control member moves accordingly simultaneously, above-mentioned manual switching device is communicated with above-mentioned wheel braking side hydraulic pressure road and above-mentioned parking with between the modulated pressure chamber when moving along with the M/C of control member, above-mentioned parking can be removed the hydraulic pressure that remains on the side that unlocks with the hydraulic pressure of modulated pressure chamber simultaneously.

The effect of invention

According to the present invention, at the hydraulic pressure that makes hydraulic power source the parking at the parking piston back side is done the time spent with the modulated pressure chamber, the parking piston-advance is the progressive position of lock piston mechanicalness locking parking piston simultaneously, therefore, can obtain the stopping brake state automatically, in addition, when removing the stopping brake state, the hydraulic pressure that makes hydraulic power source is removed stopping lock piston to be unlocked move with the effect of modulated pressure chamber and is got final product, and can automatically obtain the stopping brake state with the simple structure that is not attended by power consumption at the stopping brake state.

In addition, the hydraulic control device of electrical control takes place when unstable at the stopping brake state, and the M/C by control member makes the manual switching device action, intermittently operate drag control member gets final product.Like this, operation by drag control member is from the hydraulic pressure of pressure hydraulic generator output, action by manual switching device is used the hydraulic pressure chamber effect to stopping, remove stopping simultaneously with the effect of modulated pressure chamber, when having reduced drag control member, stop and to get back to the pressure hydraulic generator side with the hydraulic pressure of modulated pressure chamber and be released, and the releasing of stopping remains on the hydraulic pressure of the side that unlocks based on the action of manual switching device with the hydraulic pressure of modulated pressure chamber.Thereby, if repeatedly intermittently operate the drag control member M/C of shut-down operation member afterwards, the hydraulic pressure with the modulated pressure chamber of then stopping is that release position are stopped and removed hydraulic pressure with the modulated pressure chamber keeping the unlocking hydraulic pressure of side, and lock piston unlocks and moves and releasing stopping brake state.That is, unstable even hydraulic control device takes place at the stopping brake state, also can carry out the action of manual switching device and the intermittent operation of drag control member, thereby remove the stopping brake state by the M/C of control member.

Description of drawings

Fig. 1 is the longitudinal section of band parking with the plate disc brake of drum brake mechanism, is the cutaway view along the 1-1 line of Fig. 2.

Fig. 2 sees the figure of parking with the liner plate side of drum brake mechanism from the 2-2 line direction of arrow of Fig. 1.

Fig. 3 is the 3-3 line amplification view of Fig. 2.

Fig. 4 is the 4-4 line cutaway view of Fig. 3.

Fig. 5 is the figure in expression brake fluid pressure loop.

Fig. 6 is embodiment 2 and the figure cooresponding brake fluid pressure of Fig. 5 loop of expression.

Fig. 7 is embodiment 3 and the figure cooresponding brake fluid pressure of Fig. 5 loop of expression.

Among the figure: 12-is as the plate disc brake of car side brake; 76-is as the plate disc brake side hydraulic pressure road on car side brake side hydraulic pressure road; 53,138-parking piston; 54,137-stops and uses the modulated pressure chamber; 69,144-stops and uses the modulated pressure chamber with removing; 64,140-lock piston; The 86-hydraulic power source; The 87-hydraulic control device; 103-is as the control lever of control member; 108,110,146-manual switching device; 111-is as the operation knob of control member; M-is as the master cylinder of pressure hydraulic generator; P-is as the brake pedal of drag control member.

The specific embodiment

Below, the embodiments of the invention shown in describe embodiments of the present invention with reference to the accompanying drawings.

Fig. 1～Fig. 5 represents embodiments of the invention 1, Fig. 1 is the longitudinal section of band parking with the plate disc brake of drum brake mechanism, it is cutaway view along the 1-1 line of Fig. 2, Fig. 2 sees the figure of parking with the liner plate side of drum brake mechanism from the 2-2 line direction of arrow of Fig. 1, Fig. 3 is the 3-3 line amplification view of Fig. 2, Fig. 4 is the 4-4 line cutaway view of Fig. 3, and Fig. 5 is the figure in expression brake fluid pressure loop.

At first, among Fig. 1, plate disc brake 12 has been set up and has been stopped with drum brake mechanism 11, axle 4a with the wheel 13 coaxial hub units that combine 14 of the wheel that this plate disc brake 12 is installed, freely by being supported on the steering swivel 15, and this steering swivel 15 is supported on the car body (not diagram) Jie by bearing 16 rotation.

Plate disc brake 12, possess with above-mentioned brake discs 17 of taking turns 13 rotations, about can be slidably supported by carriage 18 direction of principal axis simultaneously across this brake disc 17 tops brake clamp 19, be configured in the pair of right and left slipper 20,20 between brake disc 17 both sides and the brake clamp 19.On above-mentioned brake clamp 19, be provided with hydraulic actuating cylinder 22, this hydraulic actuating cylinder 22 can cooperate front end and above-mentioned two slipper 20 slidably ... in an opposed piston 21, the back side of above-mentioned piston 21 is towards hydraulic pressure chamber 23, effect and counteraction that the hydraulic pressure that acts on according to 21 pairs of hydraulic pressure chambers of above-mentioned piston 23 produces in the direction of principal axis action, thereby brake disc 17 is by slipper 20 ... from the both sides cramping, obtain braking force with this.

Simultaneously, with reference to Fig. 2, stopping comprises brake wheel 24 with drum brake mechanism 11, be fixedly mounted on the above-mentioned steering swivel 15 liner plate 25 in order to the open end that covers brake wheel 24, have can moving contact with brake wheel 24

brake lining

26,26 and be configured in a pair of brake shoe brake cheek 27 in the brake wheel 24,27, can swingingly support those brake shoe brake cheek 27... one end can

telescopic adjustment pillar

28,28, compression be arranged between the end of two brake shoe brake cheek 27... so that two brake shoe brake cheek 27..., one end to the spring 29 of the above-mentioned pillar 28 side application of forces, at the fixer 30 that is arranged between the other end of two brake shoe brake cheek 27... on the above-mentioned liner plate 25, make two brake shoe brake cheek 27 ... the other end is to the retracing spring 31 of a side application of force that is supported by said fixing device 30, parking actuating device 32, drive and the parking joystick 33 of the above-mentioned two brake shoe brake cheek 27... of rotation manipulation via this parking actuating device 32.

Brake wheel 24, form open surface towards steering swivel 15 sides the round-ended cylinder shape arranged, its end wall 24a is fixed on the hub unit 14 with a plurality of bolt 34....In addition, the brake disc 17 of plate disc brake 12 is integrally formed with brake wheel 24.Have again, clip above-mentioned end wall 24a, each takes turns a plurality of thru-bolt 35... of 13 usefulness and wheel nut 36... is fixed on the hub unit 14.

Liner plate 25 is covered with the open end of brake wheel 24 and disposes, and each the flange 15a that is wholely set with steering swivel 15 is fixing with a plurality of bolt 37... and nut 38.In addition, the Support bracket 18 of supporting brake clamp 19 is fixed on the liner plate 25, and covering removes extra-regional brake disc 17 1 sides of brake clamp 19 and the over cap 39 of periphery is welded on the liner plate 25.

At above-mentioned two brake shoe brake cheek 27 ... another distolateral opposed faces on breach 40 is set respectively ..., those breach 40 ... on engaging the two ends of pillar 41, at pillar 41 1 ends and 27 compressions of side's brake shoe brake cheek spring 42 is set.Parking joystick 33, and the above-mentioned brake shoe brake cheek of a side 27 parts are configured in 25 of this brake shoe brake cheek 27 and liner plates overlappingly, are linking parking actuating device 32 at these parking joystick 33 1 ends.In addition, parking joystick 33 other ends engage with above-mentioned pillar 41 1 ends and are situated between and can be swingingly linked with the other end of the above-mentioned brake shoe brake cheek 27 of a side by pivot 43.

Yet, if utilize above-mentioned parking actuating device 32 that above-mentioned parking joystick 33 is rotated around the clockwise direction of pivot 43 along Fig. 2, then be situated between by pillar 41, the opposing party's brake shoe brake cheek 27 and brake wheel 24 interior all crimping, utilize all crimping in its antagonistic force, side's brake shoe brake cheek 27 and the brake wheel 24, can obtain the stopping brake state that produces by drum brake mechanism with this.

Simultaneously, with reference to Fig. 3 and Fig. 4, above-mentioned parking actuating device 32 possesses the housing 46 that is fixed on the liner plate 25 in that above-mentioned two brake shoe brake cheek 27... one are distolateral.This housing 46 possesses along the 1st 46a of portion that extends with above-mentioned pillar 28 and spring 29 parallel directions, along intersecting vertically with the 1st 46a of portion that direction is extended and linking to each other with the 1st pars intermedia to the 46a of portion the 2nd 46b of portion of all-in-one-piece is set, dispose the 1st 46a of portion in liner plate 25 inner face side, the 2nd 46b of portion connects liner plate 25 and stretches out to foreign side.

Direction of principal axis pars intermedia at the 1st 46a of portion that opens two ends, be integrally formed with dividing plate 47, on the 1st 46a of portion, the 1st sliding eye 48 is set than dividing plate 47 forward sides (left side of Fig. 4), by rear side (right side of Fig. 4) accepting hole 49 coaxial with the 1st sliding eye 48 is set in the 1st 46a of portion than aforementioned barriers 47, lid member 50 and the 1st 46a of portion of closing the 1st sliding eye 48 front ends screw.

In addition, the 2nd sliding eye 51 that is linked to be the right angle with above-mentioned accepting hole 49 is set at the 2nd 46b of portion, the 2nd sliding eye 51, by the path hole 51a of portion that links to each other with accepting hole 49 1 ends, than the big footpath of the 51a of portion, path hole and an end and coaxial continuous the forming of the coaxial 51b of big footpath hole portion that links to each other of the path hole 51a other end, form the 51c of annular stepped portion towards accepting hole 49 opposition sides between path hole 51a of portion and the big footpath hole 51b of portion, lid member 52 and the 2nd portion 46b outer end of closing the big footpath 51b of the hole portion other end screw.

Can cooperate parking piston 53 slidably in the 1st sliding eye 48 of housing 46, this parking piston 53 can utilize the forward motion that produces with the modulated pressure effect along with the parking to the rear side effect to obtain the stopping brake state, in these parking piston 53 peripheries annular seal member 60 is housed.In these parking piston 53 back sides and 47 of aforementioned barriers, the 1st 46a of portion, form and to make parking that parking has an effect with modulated pressure with modulated pressure chamber 54 at housing 46.

Above-mentioned parking piston 53 is situated between and is linked by parking joystick 33 1 ends of hookup mechanism 55 with drum brake mechanism 11, make the tractive force that acts on hookup mechanism 53 input to above-mentioned parking joystick 33 along with the forward motion of above-mentioned parking piston 53, thereby parking joystick 33 is to drum brake mechanism 11 is rotated to action one side of stopping.

Yet, above-mentioned hookup mechanism 55 is made of piston rod 53a, block 56 and connecting rod 57, piston rod 53a is situated between close and can connect aforementioned barriers 47 slidably and coaxial and connect to one with parking piston 53 rear end central portions by annular seal member 61 liquid, block 56 links and can cooperate with accepting hole 49 slidably with this piston rod 53a, 33 on connecting rod 57 binding blocks 56 and shut-down operation bar are equipped with in order to stop the stopper ring 62 of above-mentioned block 56 from accepting hole 49 disengagings at the aforementioned barriers opposition side, in accepting hole 49 ends.

Parking joystick 33 1 ends are bent into roughly, and U word shape, is provided with and the expansion engagement section 57a that stops joystick 33 1 end butts, engages connecting above-mentioned connecting rod 57 ends of inserting in its slit 58 to form slit 58.And enlarge engagement section 57a and make the bearing surface 59 that is arranged on the parking joystick 33 for butt, engaging for circular-arc, not only act on the tangent line of the tractive force of the parking joystick 33 above-mentioned bearing surface 59 on the contact point of above-mentioned expansion engagement section 57a when maximum along with the forward motion of above-mentioned parking piston 53, with meet at right angles from the tractive force action direction of connecting rod 57 to parking joystick 33, and in the whole stroke zone of connecting rod 57, all rectangular at the above-mentioned tangent line that enlarges on the contact point of engagement section 57a with above-mentioned tractive force action direction.

And enlarging that engagement section 57a forms towards bearing surface 59 with the outside shape of above-mentioned bearing surface 59 contact portions at least is protruding curved surface shape.

In addition, in housing 46, be provided with lockout mechanism 63, forward motion for above-mentioned parking piston 53 mechanically is locked in progressive position along with parking piston 53 automatically locks action, removes along with stopping with the effect of modulated pressure to the side action that unlocks simultaneously.

This lockout mechanism 63, possesses lock piston 64, clamping part 65 and pair of

locking portion

66,66, lock piston 64 is when the forward motion of parking piston 53, effect is towards direction of principal axis one side's the application of force, and has axis with above-mentioned parking piston 53 intersect vertical axis, can cooperate with above-mentioned housing 46 slidably, can making simultaneously stops removes with controlling the direction of principal axis other direction effect of pressing to, clamping part 65 is arranged on the intermediate member block 56 of the hookup mechanism 55 that links 33 of above-mentioned parking piston 53 and parking joysticks, pair of

locking portion

66,66 in order to engage from the rear with this clamping part 65 so that mechanically lock the forward motion position of above-mentioned parking piston 53, and be arranged on above-mentioned lock piston 64 direction of principal axis one end.

Block 56, its formation is: the cross-sectional plane with essentially rectangular shape, make the thin thickness of the intersect vertical axis direction of itself and the 2nd sliding eye 51 and accepting hole 49, being integrally formed with spherical clamping part 65 on this block 56 makes it side-prominent to two from this block 56, at lock piston 44 opposition sides, the part of above-mentioned clamping part 65 and accepting hole 49 inner face moving contacts.

Lock piston 64, with be configured in than 2nd sliding eye 51 of above-mentioned parking piston 53 and can cooperate slidably by rear side, one possesses minor diameter part 64a and large-diameter portion 64b, minor diameter part 64a can cooperate slidably with the path hole 51a of portion of the 2nd sliding eye 51, large-diameter portion 64b its with minor diameter part 64a rear portion between form and link to each other with the opposed annular stepped 64c of portion of the end difference 51c of the 2nd sliding eye 51 and with minor diameter part 64a is coaxial, can cooperate slidably with the large-diameter portion 51b of the 2nd sliding eye 51 simultaneously.

In lock piston 64 and the compression of 52 of members of lid a pair of

spring

68,68 of configuration side by side for example is set so that lock piston 64 axially a side be block 56 side elastic force-applyings.In addition, between the end difference 51c of the end difference 64c of lock piston 64 and the 2nd sliding

eye

51 and 46 of lock piston 64 and housings, form to take place stop removing stops with the ring-type of modulated pressure effect removes with modulated pressure chamber 69 so that the lock piston 64 opposite side application of force axially, lock piston 64 towards the compression area of stop removing with modulated pressure chamber 69, set greatly towards stopping with the compression area of modulated pressure chamber 54 than above-mentioned parking piston 53.

In addition, the periphery of the minor diameter part 64a of lock piston 64 and large-diameter portion 64b be equipped with from the direction of principal axis both sides sealing stop remove with modulated pressure chamber 69 and with the path hole 51a of portion of the 2nd sliding eye 51 and the

annular seal member

70,71 of the big footpath hole 51b of portion moving contact.

Minor diameter part 64a at an end of lock piston 64, a pair of above-mentioned

locking part

66,66 links to each other at the block 56 of above-mentioned athwart hookup mechanism 55 pars intermedias of the progressive position of parking piston 53 and is provided with, and the outer peripheral face of locking part 66... forms the thin narrow taper of front so that it can insert in the accepting hole 49 than the 2nd sliding eye 51 path hole 51a of portion paths.

In addition, locking part 66... is formed with can be from rear side and above-mentioned clamping part 65 butts, the snap-latch surface 66a that engages, these snap-latch surfaces 66a... tilts the closer to parking piston 53 direction of principal axis rear positions like this to direction of principal axis one side of above-mentioned lock piston 64 more, and be recessed to form circular-arc so that from rear and above-mentioned clamping part 65 butts, engage and mechanically lock the forward motion position of above-mentioned parking piston 53.

Among Fig. 5, along with the stepping on of brake pedal P as drag control member operated and the master cylinder M as pressure hydraulic generator of output hydraulic pressure, Jie is connected with hydraulic power source hydraulic pressure road 75 by pressure regulating valve 84, this hydraulic power source hydraulic pressure road 75, Jie is connected with plate disc brake side hydraulic pressure road 76 by normal-open electromagnetic valve 77, plate disc brake hydraulic pressure road 76 as car side brake side hydraulic pressure road links to each other with the hydraulic actuating cylinder 22 of plate disc brake 12, and above-mentioned plate disc brake hydraulic pressure road 76 is situated between and is connected with fuel tank 79 by closed type electromagnetic valve 78.Opening under the valve state of above-mentioned pressure regulating valve 84 and normal-open electromagnetic valve 77, make of hydraulic pressure chamber 23 effects of the output hydraulic pressure of master cylinder M to hydraulic actuating cylinder 22, thereby plate disc brake 12 carries out braking maneuver, by the switching of control normal-open electromagnetic valve 77 and closed type electromagnetic valve 78, thereby can control hydraulic pressure to hydraulic actuating cylinder 22 effects of plate disc brake 12 at anti-blocking brake glancing impact etc.

In addition, being situated between on the above-mentioned fuel tank 79 is being connected the suction side of the pump 81 that is driven by electro-motor 80 by check valve 82, and the ejection side of this pump 81 is connected with above-mentioned hydraulic power source hydraulic pressure road 75, and bumper 83 is connected with the ejection side of pump 81.In addition, the suction side of pump 81 Jie is connected with master cylinder M by oil sucting valve 85.

Above-mentioned electro-motor 80, pump 81, bumper 83, pressure regulating valve 84 and oil sucting valve 85, constitute hydraulic power source with master cylinder M self contained function, non-operating state at brake pedal P, make electro-motor 80 actions by opening oil sucting valve 85, thereby will spray to hydraulic power source hydraulic pressure road 75 from the braking liquid that master cylinder M sucks, and, by making pressure regulating valve 84 carry out the pressure regulation action, thereby, can be with the hydraulic pressure of hydraulic efficiency governing for stipulating on hydraulic power source hydraulic pressure road 75, the output hydraulic pressure of this hydraulic power source 86, thus when non-brake operating when making plate disc brake 12 action be used in autobrake such as control vehicle action.

Remove the hydraulic action that with modulated pressure chamber 69 carry out and the hydraulic pressure release from above-mentioned parking with modulated pressure chamber 54 and above-mentioned parking releasing with modulated pressure chamber 69 carried out to above-mentioned parking with modulated pressure chamber 54 and above-mentioned parking from above-mentioned hydraulic power source 86, hydraulic control device 87 by electrical control switches, this hydraulic control device 87, effect has the plate disc brake side hydraulic pressure road 76 and the 1st control cock 88 of stopping between the usefulness modulated pressure chamber 54 of the hydraulic pressure that takes place from hydraulic power source 86 when being arranged on normal-open electromagnetic valve 76 and driving valve, and be located at plate disc brake side hydraulic pressure road 76 and stop remove with the 2nd control cock 89 between the modulated pressure chamber 54 and constitute, the 1st and the 2nd control cock is the closed type electromagnetic valve.

Yet, when obtaining the stopping brake state,, also remove with modulated pressure chamber 69 effect hydraulic pressure to stopping to stopping with modulated pressure chamber 54 effect parking modulated pressures, thereby a side the action axially of inhibition lock piston 64, and parking piston 53 is advanced.Next, remove the hydraulic pressure of using modulated pressure chamber 69 if discharge to stop, then lock piston 64 is at spring 68 ... elastic force under side action axially, along with the preceding of parking piston 53 and lock piston 64 and then make lockout mechanism 63 carry out lock out action.

That is, snap-latch surface 66a, the 66a of the

locking part

66,66 of the lock piston of being formed on 64 1 ends arranged from the rear engaging on the clamping part 65 of the block 56 of parking piston 53 forward motion, the forward motion state of parking piston 53 is locked by mechanicalness.Axially the moment of a side release bleeds off the residual voltage of control with hydraulic pressure chamber 54 of stopping and in lock piston 64.

Like this, if parking piston 53 carries out forward motion, then the rotation by parking joystick 33 makes drum brake mechanism 11 action of stopping, and the forward motion state of parking piston 53 is locked, thereby, keep the stopping brake state.And, on drum brake mechanism 11, the power that two brake shoe brake cheek 47... are moved for stopping brake is situated between and is transmitted to two brake shoe brake cheek 47,47 by parking joystick 33, therefore, utilize the bar ratio of parking joystick 33, the hydraulic coupling that parking actuating device 32 should be taken place is smaller.

When removing the stopping brake state, remove the hydraulic pressure supercharging simultaneously of using modulated pressure chamber 69 to stopping with modulated pressure chamber 54 and stopping, and in its pressurization, at first be the action of hydraulic force bigger than spring 68... elastic force make in lock piston 64 lock piston 64 axially opposite side move, thereby, the lock-out state of lockout mechanism 63 is disengaged, and therefore, utilizes the hydraulic pressure that stops with modulated pressure chamber 54 to make parking piston 53 carry out backward movement.And at the state that unlocks of lockout mechanism 63, above-mentioned parking is removed and is remained on the hydraulic locking state with modulated pressure chamber 69, and the

locking part

66,66 of lock piston 64 moves to the position of avoiding with block 56 butts.

And, the clamping part 65 that is arranged on the block 56 forms spherical, in order to engage with clamping part 65 butts from the rear so that the forward motion position mechanicalness of parking piston 53 locking and be formed on snap-latch surface 66a... on the locking part 66... of lock piston 64, cave in into circular-arc, therefore, can make the area of contact of buckle face 65a... under the forward motion of parking piston 53 and snap-latch surface 66a... bigger, suppress because from the butt of parking piston 53 sides block 56 and lock piston 64, engagement section used load and the raising of durability is sought in the wearing and tearing that produce and press-bending etc.

Walk around the manual switching device 108 of above-mentioned hydraulic control device 87, be arranged on above-mentioned disc type brake side hydraulic pressure road 76, stop and to remove with between the modulated pressure chamber 69 with modulated pressure chamber 54 and above-mentioned parking, this manual switching device 108 is along with being configured near moving as the M/C of the control lever 103 of the control member driver's seat.

Yet, above-mentioned manual switching device 108, possess binding and derive the plate disc brake side hydraulic pressure distance 76 of master cylinder M output hydraulic pressure and above-mentioned braking with between the modulated pressure chamber 54 and walk around the 1st hydraulic pressure road 90 of hydraulic control device 87 with the valve state of running of normal-open electromagnetic valve 77 and pressure regulating valve 84, be located at and make it drive the normally closed valve 92 of valve with M/C on the 1st hydraulic pressure road 90, one end and normally closed valve 92 and the 1st hydraulic pressure road 90 with 54 of modulated pressure chambers of stopping are connected walks around hydraulic control device 87 simultaneously, and the 2nd hydraulic pressure road 91 that is communicated with modulated pressure chamber 69 is removed in the other end and above-mentioned parking, only allows to lead to modulated pressure chamber 69 effluents and be located at check valve 93 on the 2nd hydraulic pressure road 91 to the releasing of stopping.

Have form on the valve housing 94 of normally closed valve 92 with the 1st hydraulic pressure road 90 in lead to the valve chamber 95 that the upstream side part 90a on plate disc brake side hydraulic pressure road 76 is communicated with, be provided with taper valve seat 96 simultaneously towards this valve chamber 95, the front is close with valve housing 94 liquid and can cooperate slidably towards the piston 97 of valve chamber 95, one and the coaxial valve shaft 98 that extends before and after the mind-set wherein that is provided with on this piston 97, front end at valve shaft 98 is provided with the ball valve 99 that can be landed on the above-mentioned valve seat 96, makes piston 97 and valve shaft 98 to making valve body 99 be landed in the direction application of force valve spring 100 of valve seat 96 at

piston

97 and 94 compression settings of valve housing.In addition, be provided with the path 101 of an end opening, lead to the downstream part 90b that stops with modulated pressure chamber 54 in the pars intermedia of this path 101 and the 1st hydraulic pressure road 90 and be communicated with in above-mentioned valve seat 96 central authorities of valve housing 94.

Above-mentioned valve shaft 98 other ends are situated between and link control lever 103 by metal filament 102, and this control lever 103 for example is configured near the driver's seat in the aux. fascia panel.And under the non-operating state of control lever 103, normally closed valve 92 is in the elastic force that utilizes valve spring 100 makes valve body 99 be landed in the valve state that closes on the valve seat 96, and it closes between upstream side part on the 1st hydraulic pressure road 90 under the valve state and

downstream part

90a, 90b and is cut off.Yet, if the opposing elastic force of valve spring 100 and draw operations control lever 103, valve body 99 from valve seat 96 leave, valve left by normally closed valve 92, be connected between the 1st hydraulic pressure road 90 upstream sides part and

downstream part

90a, 90b.

Check valve 93 possesses the valve housing 94 common with normally closed valve 92, this valve housing 94 is provided with the other end that the makes above-mentioned path 101 taper valve seat 106 at the central portion opening, form simultaneously towards the valve chamber 103 of this valve seat 106 and make its 1st hydraulic pressure road 90 side ends that pass through the 2nd hydraulic pressure road 91, can be landed on the valve seat 106 and be housed between ball valve 104 in the valve chamber 103, the valve housing 94 compression and valve spring 105 is set applies the elastic force that valve body 104 is taken a seat.

And this check valve 93 is driven valve in order to remove to stopping with the hydraulic pressure on 69 side effects the 1st hydraulic pressure distance 90, modulated pressure chamber when valve left by normally closed valve 92, and braking liquid is removed from stopping with returning by check valve 93 of 69 side direction the 1st hydraulic pressure road, modulated pressure chamber, 90 sides and stoped.

That is, be communicated with plate disc brake side hydraulic pressure road 76 when manual switching device 108 moves along with the operation of control lever 103 and stop and use 54 of modulated pressure chambers, will stop simultaneously and remove the hydraulic pressure that remains the side that unlocks with the hydraulic pressure of modulated pressure chamber 69.

Next, effect about the 1st embodiment describes, then make when the action of drum brake mechanism 11 stopping brakes, can stop with 54 effects of modulated pressure chamber to the parking of parking piston 53 rear side that have towards parking actuating device 32 and use modulated pressures, make parking piston 53 forward motion, thereby, can make drum brake mechanism 11 braking maneuvers and obtain the stopping brake state, in addition, the parking operating state that forward motion by parking piston 53 produces is locked by lockout mechanism 63 mechanicalnesses, therefore, can obtain the stopping brake state automatically, in addition, when removing stopping brake, can stop to remove to lockout mechanism 63 effects and use modulated pressure, can under the stopping brake state, obtain the stopping brake state automatically with the simple structure of not following power consumption.

In addition, remove the hydraulic action that carries out with modulated pressure chamber 69 from hydraulic power source 86 to stopping with modulated pressure chamber 54 and stopping, and hydraulic pressure release from stopping and carrying out with modulated pressure chamber 69 with the modulated pressure chamber 54 and the releasing of stopping, hydraulic control device 87 by electrical control switches, and the manual switching device 108 of walking around hydraulic control device 87 is arranged on plate disc brake side hydraulic pressure road 76, stop with modulated pressure chamber 54 and stop and remove with between the modulated pressure chamber 69, this manual switching device 108 moves along with the operation that is configured near the control lever 103 the driver's seat.

And,

manual switching device

108,54 of modulated pressure chambers are used in plate disc brake side hydraulic pressure distance 76 and above-mentioned braking that possessing binding derives master cylinder M output hydraulic pressure with the valve state of running of normal-open electromagnetic valve 77 and pressure regulating valve 84, and walk around the 1st hydraulic pressure road 90 of hydraulic control device 87, be located at and make it drive the normally closed valve 92 of valve with M/C on the 1st hydraulic pressure road 90, one end and normally closed valve 92 and the 1st hydraulic pressure road 90 of stopping with 54 of modulated pressure chambers are connected, walk around hydraulic control device 87 simultaneously, and the 2nd hydraulic pressure road 91 that is communicated with modulated pressure chamber 69 is removed in the other end and above-mentioned parking, only allows to lead to modulated pressure chamber 69 effluents and be located at check valve 93 on the 2nd hydraulic pressure road 91 to the releasing of stopping.

According to the formation of this manual switching device 108, hydraulic control device 87 takes place when unstable at the stopping brake state, can operating operation bar 103 and make normally closed valve 92 drive valve, and intermittent operation brake pedal P simultaneously.Such one, then make the hydraulic pressure of master cylinder M output by brake pedal P, act on and stop with modulated pressure chamber 54, be situated between simultaneously and act on the releasing usefulness modulated pressure chamber 69 of stopping by check valve 93, when having reduced brake pedal P, the hydraulic pressure with modulated pressure chamber 54 of stopping turns back to master cylinder M side and is released, and the releasing of stopping can not turn back to master cylinder M side with the hydraulic pressure of modulated pressure chamber 69 based on the action of check valve 93.

Thereby, if repeatedly intermittently operate brake pedal P shut-down operation afterwards, the hydraulic pressure with modulated pressure chamber 54 of then stopping is that release position are stopped and removed hydraulic pressure with modulated pressure chamber 69 keeping the unlocking hydraulic pressure of side, and lock piston 64 unlocks and moves and releasing stopping brake state.That is, unstable even hydraulic control device 87 takes place at the stopping brake state, also can utilize driving valve and carrying out the such M/C of discontinuous operation of brake pedal P and remove the stopping brake state of the normally closed valve 92 that produces by the operation of control lever 103.

Fig. 6 represents embodiments of the invention 2, to attachedly only illustrate with the cooresponding part of above-mentioned the 1st embodiment with same reference marks, detailed.

The manual switching device 110 of walking around hydraulic control device 87 is arranged on plate disc brake side hydraulic pressure road 76, stops and remove with 69 of modulated pressure chambers with modulated pressure chamber 54 and above-mentioned parking, this manual switching device 110 moves along with the M/C of operation knob 111, for example, be configured in the engine room so that can M/C aforesaid operations knob 111, perhaps be configured in the baggage container so that can M/C aforesaid operations knob 111 by the opening luggage-boot lid by open hood.

Manual switching device 110, possess the plate disc brake side hydraulic pressure distance 76 and the above-mentioned braking of running derivation master cylinder M output hydraulic pressure under the valve state that are attached at normal-open electromagnetic valve 77 and pressure regulating valve 84 and use 54 of modulated pressure chambers, and walk around the 1st hydraulic pressure road 112 of hydraulic control device 87, being located at the 1st hydraulic pressure road 112 makes its M/C with above-mentioned operation knob 111 drive the normally closed valve 114 of valve, one end and normally closed valve 114 and the 1st hydraulic pressure road 112 of stopping with 54 of modulated pressure chambers are connected, walk around hydraulic control device 87 simultaneously, and the 2nd hydraulic pressure road 113 that the other end and the releasing of stopping are communicated with modulated pressure chamber 69 only allows to remove the check valve 115 that leads to and be located at the 2nd hydraulic pressure road 113 with modulated pressure chamber 69 effluents to parking.

Normally closed valve 114 is configured on the main body 116, in these main body 116 upper sheds in main body 116 1 sides so that its 1st opening 117 that is communicated with the upstream side part 112a of plate disc brake side hydraulic pressure road 76 sides in the 1st hydraulic pressure road 112, sliding eye 118 than the 1st opening 117 big footpaths, be the tapped bore 119 coaxial continuous settings of main body 116 another sides than this sliding eye 118 big footpaths and opening, simultaneously, be provided with the 1st hydraulic pressure road 112 in stop downstream part 112b with modulated pressure chamber 54 sides be communicated with the while and intersect vertically with above-mentioned sliding eye 118, and make its inner be opened on the opening 120 of these sliding eye 118 inner faces.Hole 119 to the 1 openings, 117 its openings are by main body 116 another sides.

Above-mentioned normally closed valve 114, utilize valve body 122 to cut off 117,120 of above-mentioned openings all the time, valve body 122, front end has the tapered portion 122a of the inner peripheral portion butt of the taper end difference 121 that can and be formed on 118 of above-mentioned opening 117 and above-mentioned sliding eyes, can and can cooperate with above-mentioned sliding eye 118 movably around the axis rotation simultaneously at axis direction, the screw spindle part 123 that is wholely set with valve body 122 screws with tapped bore 119, is attached thereto at screw spindle part 123 outer ends, aforesaid operations knob 111 and is arranged to one.And, than above-mentioned opening 120 towards the open end of sliding eye 118 near tapped bore 119, O shape circle 124 with sliding eye 118 inner face moving contacts is installed in valve body 122 peripheries.

In this open and close valve 114, screw in wherein, thereby make the tapered portion 122a and the end difference 121 inner peripheral portion whole circumference butts of valve body 122 front ends by screw spindle part 123 and tapped bore 119 are screwed, thereby, can cut off 117,120 of openings.In addition, make screw spindle part 123 lax with the state that screws of tapped bore 119 as if rotary manipulation operation knob 111, the bigger diameter end portion that makes valve body 122 retreat into the tapered portion 122a of its front end is positioned at than the position of opening 120 towards close tapped bore 119 sides of open end of sliding eye 118, and then 117,120 of openings are connected.

Check valve 115 is common to be configured on the main body 116 of normally closed valve 114, main body 116 be provided with above-mentioned sliding eye 118 is clipped in each other and with above-mentioned opening 120 axially extending paths 125, at main body 116, and the coaxial valve chamber 127 of 126 formation of bolt member that screw of this main body 116 and above-mentioned path 125.

And check valve 115, possess make above-mentioned path 125 at the central portion opening and towards the taper valve seat 128 of valve chamber 127, can be landed on this valve seat 128 and be housed in ball valve 129, the application of force in the valve chamber 127 and make valve seat 128 be landed on the valve body 129 and be arranged on bolt member 126 and the valve spring 130 of 129 of valve bodies.

Aforementioned body 116 is provided with Jie and leads to the path 131 that modulated pressure chamber 69 is used in the releasing of stopping by the 2nd hydraulic pressure road 113, and these path 131 the inners are communicated with above-mentioned valve chamber 127.

And this check valve 115, when valve left by normally closed valve 114, drive valve in the releasing of stopping with modulated pressure chamber 69 sides for the hydraulic action that makes the 1st hydraulic pressure road 112, braking liquid is removed from stopping with 69 side direction the 1st hydraulic pressure road, modulated pressure chamber, 112 sides and is returned by check valve 115 preventions.

That is, be communicated with plate disc brake side hydraulic pressure road 76 when manual switching device 110 moves along with the operation of operation knob 111 and stop and use 54 of modulated pressure chambers, will stop simultaneously and remove the hydraulic pressure that remains the side that unlocks with the hydraulic pressure of modulated pressure chamber 69.

Can reach similarly to Example 1 effect according to this embodiment 2.

Fig. 7 represents embodiments of the invention 3, to attachedly only illustrate with the cooresponding part of the various embodiments described above with same reference marks, detailed.

Parking actuating device 32 ', thereby push parking joystick 33 ' acquisition stopping brake state, this parking actuating device 32 ', possess housing 136 and parking piston 138, parking piston 138 makes from the outstanding end of housing 136 and above-mentioned parking joystick 33 ' is connected and can bearing fit with housing 136, and the while back side is towards the parking usefulness modulated pressure chamber 137 that is formed between it and the housing 1.

In addition, in the housing 136, be provided with lockout mechanism 139, along with the forward motion of this parking piston 138 is carried out lock out action automatically, remove simultaneously and move to the side that unlocks with the effect of modulated pressure along with stopping for parking piston 138 mechanicalnesses are locked in progressive position.

Above-mentioned lockout mechanism 139, comprise have with parking piston 137 intersect vertical axis axis and the lock piston 140 that can cooperate slidably, be arranged on the block button hole 141 of above-mentioned parking piston 137 pars intermedias with housing 136, in order to engage the locking part 142 that is arranged on above-mentioned lock piston 140 direction of principal axis one end so that mechanicalness locks the forward motion position of above-mentioned parking piston 138 with this block button hole 141.

Compression is provided with spring 143 between lock piston 140 and housing 136, with so that lock piston 140 side piston 138 side elastic force-applyings that promptly stop axially.In addition, 36 of lock piston 140 and housings, form ring-type and stop and remove with modulated pressure chamber 144, the performance hydraulic coupling is pushed lock piston 140 to leave direction of retreat at interval from parking piston 138 to the elastic force of resisting above-mentioned spring 143 when hydraulic action.

Remove the hydraulic action that with modulated pressure chamber 144 carry out and the hydraulic pressure release from above-mentioned parking with modulated pressure chamber 137 and above-mentioned parking releasing with modulated pressure chamber 144 carried out to above-mentioned parking with modulated pressure chamber 137 and above-mentioned parking from above-mentioned hydraulic power source 86, switch by the hydraulic control device 87 of electrical control.

And when obtaining the stopping brake state, stop with 137 effects of modulated pressure chamber to stopping and use modulated pressure, also remove with modulated pressure chamber 144 effect hydraulic pressure stopping, thereby a side the action axially of inhibition lock piston 140, and parking piston 138 is advanced.Next, if discharge to stop remove hydraulic pressure with modulated pressure chamber 144, then lock piston 140 under the elastic force effect of spring 143 axially a side move, along with the preceding of parking piston 138 and lock piston 140 and then make lockout mechanism 139 carry out lock out action.

That is, be brought to the locking part 142 of snap lock piston 140 in the block button hole 141 with lock piston 140 correspondence positions along with the forward motion of parking piston 138, the forward motion state of parking piston 138 is locked by mechanicalness.Axially the moment of a side release bleeds off the residual voltage of control with hydraulic pressure chamber 137 of stopping and in lock piston 140.

Walk around the manual switching device 146 of above-mentioned hydraulic control device 87, be arranged on above-mentioned disc type brake side hydraulic pressure road 76, stop and remove with 144 of modulated pressure chambers with modulated pressure chamber 137 and above-mentioned parking, this manual switching device 146, along be configured near the driver's seat as the M/C of the control lever 103 of control member and move.

And above-mentioned manual switching device 146, possess be attached at running under the valve state of normal-open electromagnetic valve 77 and pressure regulating valve 84 derive the plate disc brake side hydraulic pressure distance 76 of master cylinder M output hydraulic pressure and above-mentioned braking with 137 of modulated pressure chambers and with the 1st normally closed valve 147 that the 1st control cock 88 of above-mentioned hydraulic control device 87 is connected in parallel, sandwich be located at disc type brake Lu side hydraulic pressure road 76 and stop remove the 2nd normally closed valve 92 that is connected in series with 144 of modulated pressure chambers ' reach check valve 93 '.

The 2nd normally closed valve 92 ', constitute equally with the normally closed valve 92 of embodiment 1, its formation is along with near the operation that is configured in the driver's seat control lever 103 in the aux. fascia panel for example and drive valve.In addition, check valve 93 ', basic comprising similarly to Example 1, be configured in the 2nd normally closed valve 92 ' valve housing 94 ' on, be located at the 2nd normally closed valve 92 ', lead to and stop to remove with 148 on the hydraulic pressure road of modulated pressure chamber 144.

Drive valve when in addition, the hydraulic pressure of the 1st normally closed valve 147 on the 2nd normally closed valve 92 ' run valve, above-mentioned hydraulic pressure distance 148 raises.

According to this manual switching device 146, hydraulic control device 87 takes place when unstable at the stopping brake state, can operating operation bar 103 and make normally closed valve 92 ' open valve, intermittent operation brake pedal P simultaneously.Such one, then make the hydraulic pressure of master cylinder M output, be situated between and remove with modulated pressure chamber 144, simultaneously by check valve 93 ' acting on stops by brake pedal P, the 1st normally closed valve 147 increases along with the hydraulic pressure on hydraulic pressure road 148 and drives valve, and stopping is communicated with master cylinder M with modulated pressure chamber 137.

Thereby, when having reduced brake pedal P, then parking is got back to master cylinder P side with the hydraulic pressure of modulated pressure chamber 137 and is released, and stop to remove with the hydraulic pressure of modulated pressure chamber 144 based on check valve 93 ' action and can not get back to master cylinder M side, if repeatedly intermittently operate brake pedal P shut-down operation afterwards, then stop to remove hydraulic pressure with modulated pressure chamber 144 keeping the unlocking hydraulic pressure of side, lock piston 140 unlock action and releasing stopping brake state.

More than, embodiments of the invention have been described, but, the present invention is not limited to the foregoing description, can carry out various design modifications to not breaking away from the described the present invention of patent claimed range.

Claims

1. Vehicular brake device,

Possess:

Pressure hydraulic generator, it can act on the corresponding hydraulic pressure of operation with drag control member to the car side brake side hydraulic pressure road (76) that links to each other with car side brake (12),

Hydraulic power source (86), it can move independently with this pressure hydraulic generator,

Parking piston (53,138), its back side is towards stopping with modulated pressure chamber (54,137), and utilize and this parking increase cooresponding forward motion with the hydraulic pressure of modulated pressure chamber (54,137) and can obtain to be equipped with above-mentioned car side brake (12) wheel stop braking mode

Lock piston (64,140), its by action progressive position automatically lock this parking piston (53,138), simultaneously and stop remove with the hydraulic pressure increase of modulated pressure chamber (69,144) move to accordingly unlock a side and

Hydraulic control device (87), it carries out electrical control and uses modulated pressure chamber (54,137) and above-mentioned parking releasing to use modulated pressure chamber (69,144) to discharge hydraulic pressure with modulated pressure chamber (69,144) effect hydraulic pressure and from above-mentioned parking with modulated pressure chamber (54,137) and above-mentioned parking releasing in order to switch from hydraulic power source (86) to above-mentioned parking, it is characterized in that:

Also has manual switching device (108,110,146), its walk around this hydraulic control device (87) and be arranged on above-mentioned car side brake side hydraulic pressure road (76), above-mentioned parking with modulated pressure chamber (54,137) and above-mentioned parking remove with between modulated pressure chamber (69,144), the M/C of while with control member (103,111) move accordingly

And, above-mentioned manual switching device (108,110,146), when moving, be communicated with along with the M/C of aforesaid operations member (103,111) above-mentioned wheel braking side hydraulic pressure road (76) and above-mentioned parking with modulated pressure chamber (54,137) between in, above-mentioned parking can also be removed the hydraulic pressure that remain the side that unlocks with the hydraulic pressure of modulated pressure chamber (69,144).